64:2  INDEX    TO    PUBLICATIONS    OF    U.   S.    GEOL.   SURVEY,     [bull.  177. 
Pyroxene-syenite  of  Sierra  Nevada Ann  17,  i,  pp  635-636 
Pyroxenite,  analysis  of,  from  California,  Mount  Diablo Ann  17, 
i,  p  735;  Bull  90,  p  73;  Bull  148,  p  224;  Bull  168,  p  213 
analysis  of,  from  Maryland,  Baltimore  County Bull  64, 
pp  42,  43;  Bull  148,  p  83;  Bull  150,  p  288;  Bull  168,  p  42 
from  Montana,  near  Meadow  Creek . Bull  90, 
p  70;  Bull  148,  p  140;  Bull  168,  p  114 
from  North  Carolina,  Webster Bull  148,  p  92;  Bull  168,  p  53 
from  Maryland,    Pikesville,.  description  of,  as  one  of  the  educational 
series Bull  150,  pp  286-288 
of  California,  Big  Trees  quadrangle GF  51,  p  5 
Jackson  quadrangle GF  11,  p  4 
Nevada  City  district GF  29,  p  4 
Placerville  quadrangle GF  3,  p  2 
Sacramento  quadrangle GF  5,  p  2 
Smartsville  quadrangle GF  18,  p  4 
of  Maryland-District  of  Columbia- Virginia,  Washington  quadrangle. .  .GF  70,  p  3 
of  Sierra  Nevada Ann  14,  n,  pp  476-477;  Ann  17,  i,  pp  584,  649,  650,  670 
Pyrrhotite,  composition  of Bull  150,  p  34 
typical  composition  of MR  1885,  p  516 
Quadrant  formation,  description  and  section  of Ann  20,  in,  pp  294-298 
in  Montana Bull  110,  pp  39-43;  GF  24,  p  2;  GF  55,  p  2;  GF  56,  p  2 
features  of Bull  139,  pp  41-43 
in  Yellowstone  Park Mon  xxxn,  n,  pp  25,  32,  34,  36,  38,  41,  47,  48,  51, 160 
Quadrant  quartzite  in  Montana GF  1,  p  2 
in  Wyoming GF  30,  pp  1-2,  5 
Quantitative  determination  of  silver  by  means  of  the  microscope. .  .Ann  6,  pp  323-352 
Quarry  and  geologic  terms,  glossary  of Ann  19,  in,  pp  306-307 
Quarry  limestone  of  Texas Ann  21,  vn,  pp  275-276 
Quartz,  analysis  of,  from  California,  Big  Trees  quadrangle Ann  17,  i,  p  706 
analysis  of,  from  Colorado,  Leadville  district  (granular) Mon  xn,  pp  557,  602 
from  North  Carolina,  Montgomery  County Bull  74,  p  42 
from  Wisconsin,  Marathon  County Ann  20,  vi  cont,  p  462 
as  a  product  of  mineralogical  metamorphism Bull  62,  p  210 
composition  of Bull  150,  pp  34-35 
conversion  of,  to  serpentine Mon  xin,  p  123 
from  Wyoming,  Electric  Peak,  in  diorite Ann  12,  i,  p  603 
in  basalt Mon  xx,  p  339 
in  gneisses  of  southwestern  Minnesota Bull  157,  pp  49-51 
in  Montana,  Butte  district GF  38,  p  6 
occurrence  and  statistics  of. .  .MR  1882,  pp  489-490,  586;  MR  1883-84,  pp  748-756, 
763-765,  781;  MR  1885,  pp  438,  440,  441,  443;  MR  1886,  pp 
595,  596,  604;  MR  1887,  pp  556,  557,  560-561;  MR  1888,  pp 
584-585;  MR  1889-90,  pp  446,  447,  448;  MR  1891,  pp  539, 
540,  547;  MR  1892,  pp  770-773,  781;  Ann  16,  iv,  pp  601- 
602,  604,  605;  Ann  17,  in  cont,  pp  911-912,  923;  Ann  18,  v 
cont,  pp  1204-1205,  1217;  Ann  19,  vi  cont,  pp  505-506,  513; 
Ann  20,  vi  cont,  pp  587-589, 599;  Ann  21,  vi  cont,  pp  595-596 
primary,  occurrence  of,  in  certain  basalts Bull  66 
secondary  enlargement  of,  in  sandstones Ann  5,  pp  218-237;  Bull  8,  pp  11-43 
thin  section  of,  from  California,  Grass  Valley,  showing  gold   in   pyrite 
and Ann  17,  n,  pp  134-135 
from  California,  near  Sonora,  pegmatoid  intergrowth  of  tourmaline.. Ann  17, 
i,  pp  748-749 
